What are generator expressions in Python?

What are generator expressions in Python?

Generator expressions are a concise way to create generators in Python using a syntax similar to list comprehensions.

Can you give me an example of a generator expression?

Sure! Here's a simple example: (x*x for x in range(5)) generates squares of numbers from 0 to 4.

How do they differ from list comprehensions?

The main difference is that generator expressions return a generator object, which produces items one at a time, while list comprehensions return a complete list.

When should I use generator expressions?

Use generator expressions when you want to save memory or when you're working with large datasets that don't fit in memory.